I'm having a whole bunch of problems with my KWA USP full size. I'm way past warranty and I've replaced 6 parts, 2 of which came from the magazine.

Recently my hop up bucking went bad (Never lubricated it at all) and I replaced it with REAPS (Never doing that again) and I plan on going back to the KWA bucking. But my loading nozzle/cylinder wont return when I rack the slide.

When the slide is locked back, the cylinder is just hanging there, and when I give it a little push back, it springs backwards to where it should be.

Also when I slowly let the slide forward, the cylinder randomly springs back where it should be. But it still causes problems with gas consumption.

Hi RS - Welcome to the KWA forums. The cylinder not springing back, assuming it's not stuck in the hop-up bucking, is typically either from a broken or damaged cylinder return spring or the cylinder needs lubrication. Hopefully, it's the latter. Here is a video that should help with proper maintenance. See here: http://www.kwausa.co...?showtopic=3157

Watch the whole video but at around 2 min 30 sec. you will see the cylinder sticking. Let us know if this works.

Yep, I just hope that the word gets out that people SHOULDN'T buy the REAPS bucking for the KWA USP. Maybe don't buy it at all. They're too hard for the low FPS that GBBs produce. It would be better suiting for, maybe, a CO2 pistol.

I'll make an order for a new bucking. And if the problems continue, I'm out of luck.